CN211111277U - Upward flow denitrification deep bed filter and filter material loss prevention structure thereof - Google Patents

Abstract

The utility model relates to a water treatment technical field discloses an upward flow denitrification deep bed filtering pond and prevent filter material loss structure thereof, prevent that the filter material loss structure sets up in the filtering pond, the filtering pond is separated by the filtering material layer and is formed the filtering area and treat the filtering area, prevent that the filter material loss structure sets up the filtering area, a serial communication port, including the bottom plate and with two first curb plates that the bottom plate links to each other and set up relatively, the bottom plate with two first curb plates enclose to close and form the water catch bowl, the water catch bowl links to each other with the delivery port in filtering pond, contained angle between first curb plate and the horizontal plane is the acute angle. The filter tank with the structure for preventing the filter material from running off is simple in structure, the problem that the filter material runs off in the backwashing process can be solved, the phenomenon that the upward floating sludge influences the water quality is avoided occasionally, the backwashing effect can be effectively improved, the filter material treatment capacity is enhanced, and the water quality is ensured.

Description

Upward flow denitrification deep bed filter and filter material loss prevention structure thereof

Technical Field

The utility model relates to a water treatment technical field especially relates to an upward flow denitrification deep bed filtering pond and prevent filter material loss structure thereof.

Background

At present, with ten items of water release, the effluent discharge standard of a sewage treatment plant is required to reach the first grade A standard. In recent years, sewage discharge standards are issued in some places successively, and some requirements meet the requirements of surface class V and class IV, even surface class III. According to incomplete statistics, about 50% of sewage treatment plants still do not reach the standard and mainly contain excessive nitrogen and phosphorus by 2018, and direct discharge to a water body can cause eutrophication of the water body, so that advanced treatment is needed.

The upward flow denitrification deep bed filter tank is provided with water inlet at the lower part and water outlet at the upper part, and is one of the common standard improvement and reconstruction technologies of the current sewage treatment plant. Compared with the traditional gravity flow type denitrification deep bed filter tank, the filter tank has the advantages of strong dirt holding capacity, capability of saving the carbon source adding amount by 20-30%, high filtering speed, no need of nitrogen displacement, high denitrification efficiency and short starting time.

The upward flow denitrification deep bed filter with the steel-concrete structure is newly built, and the backwashing drainage adopts a flap valve, so that the closed-tank backwashing can be realized, and the loss of filter materials does not exist. However, the upward flow denitrification deep bed filter with the steel structure and the improved reinforced concrete structure does not adopt a flap valve, closed-tank backwashing cannot be realized, filter materials can be taken out in the backwashing process, the filter materials are required to be supplemented regularly, resources are wasted, and the operating cost is increased. The filter material that runs out flows into drainage pipe, still can cause serious wearing and tearing to the valve, has the risk of jam valve simultaneously. In order to avoid serious loss of the filter material, the washing strength and the backwashing time are usually reduced, so that the filter material is not washed cleanly, the backwashing effect is reduced, and the effluent quality is influenced. In addition, the upward flow denitrification deep bed filter occasionally has bottom anaerobic sludge floating in the operation process, and the risk of effluent not reaching the standard exists. Therefore, the problems of filter material loss and floating sludge outflow along with water are urgently to be solved in the process application.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the upward flow denitrification deep bed filter tank and the filter material loss prevention structure thereof are simple in structure, can solve the problem that filter materials are lost in the backwashing process, avoid the phenomenon that floating sludge influences effluent water quality occasionally, effectively improve the backwashing effect, enhance the filter material treatment capacity and ensure the effluent water quality.

In order to realize the above-mentioned purpose, the utility model provides a prevent filter material structure that runs off, prevent that the filter material structure that runs off sets up in the filtering pond, the filtering pond is separated by the filtering material layer and is formed the filtering area and treat the filtering area, prevent that the filter material structure that runs off sets up the filtering area, including the bottom plate and with two first curb plates that the bottom plate links to each other and sets up relatively, the bottom plate with two first curb plates enclose to close and form the water catch bowl, the water catch bowl links to each other with the delivery port in filtering pond, interval between two first curb plates certainly the notch of water catch bowl increases gradually to the bottom plate direction.

Preferably, the top of the first side plate is connected with a second side plate, the second side plate is perpendicular to the horizontal plane, and the included angle between the second side plate and the first side plate is an obtuse angle.

Preferably, the air guide plate is further included and fixedly connected to the outer side of the second side plate through a fixing piece.

Preferably, the top of the baffle is flush with the top of the second side plate.

Preferably, the guide plate is fixedly connected to the first side plate through the rectifying plate, and a plurality of water distribution ports are formed in the rectifying plate.

Preferably, the bottom plate comprises two third side plates which are oppositely arranged, one ends of the two third side plates are connected, the other ends of the third side plates are connected with the first side plate, and an included angle is formed between the two third side plates.

Preferably, a plurality of weir notches are formed in the top of the second side plate.

Preferably, the weir is serrated in shape.

Preferably, the range of the height of the 8 weir crests is 30-100mm, the ratio of the width to the height of the weir crests is 2:1, and the distance between every two adjacent weir crests is smaller than or equal to 50 mm.

In order to realize the same purpose, the utility model also provides an upward flow denitrification deep bed filtering pond, including the filtering pond, be equipped with foretell filter material loss prevention structure in the filtering pond.

The embodiment of the utility model provides an upward flow denitrification deep bed filtering pond and prevent filter material loss structure thereof compares with prior art, and its beneficial effect lies in:

the utility model discloses upward flow denitrification deep bed filtering pond and its structure of preventing that the filter material runs off, it prevents that the filter material from running off the structure when filtering or backwash, after the filter material touching bottom plate of upper punch, the filter material can be the pitch arc according to fluid mechanics principle and sink, other filter materials can receive the gravity action along first curb plate landing after touching first curb plate, can effectively prevent the loss of backwash in-process filter material, reinforcing backwash intensity and time improve the backwash effect, rinse the filter material layer more thoroughly, prevent that the filter material from hardening. Upward flow denitrification deep bed filtering pond is through setting up the structure that prevents that the filter material runs off on it for when the back flush, the filter material strikes the bottom plate of water catch bowl, can sink and return to the filter material layer, and few filter materials can flow into water passing channel through the water distribution mouth along with backwash waste water, because first curb plate has certain gradient, the filter material strikes the swash plate and can sink in the region and return to the filter material layer, and backwash waste water can cross the guide plate simultaneously, and the not smashed superficial mud is followed backwash waste water overflow and is obtained thorough washing in flowing into the water catch bowl to water passing channel. Adopt the utility model discloses an upward flow denitrification deep bed filtering pond simple structure can solve back flush in-process filter material and run off, has avoided appearing the phenomenon that come-up mud sediment influences water quality of water occasionally, can effectively improve back flush effect simultaneously, and reinforcing filter material throughput guarantees water quality of water.

Drawings

FIG. 1 is a top view of an upward flow denitrification deep bed filter according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1 in a filtration state;

FIG. 3 is a cross-sectional view taken at B-B of FIG. 1 in a filtration state;

FIG. 4 is a cross-sectional view at C-C of FIG. 1;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 1 in a backwash state;

FIG. 6 is a cross-sectional view taken at B-B of FIG. 1 in a backwash state;

FIG. 7 is a top view of the structure for preventing filter material loss according to the embodiment of the present invention;

figure 8 is an elevation view of a second side panel of an embodiment of the present invention;

FIG. 9 is an enlarged view of a portion of FIG. 3 at D;

fig. 10 is a partial enlarged view at E in fig. 6;

in the figure, 1, a structure for preventing filter material from running off, 11, a first side plate, 12, a second side plate, 121, a weir crest, 13, a third side plate, 14, a rectifying plate, 15, a fixing piece, 16, a water collecting tank, 17, a guide plate, 2, a filtered area, 3, a to-be-filtered area, 4, a filter material layer, 5, a water outlet, 6 and a water passing channel.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

It is to be noted that, in the drawings, the direction of the arrow is a water flow direction. When the upward flow denitrification deep bed filter is normally used for filtering, water to be treated flows into a region 3 to be filtered (specifically comprising a water and gas distribution channel or chamber and a water and gas distribution system) from a water inlet pipe at the bottom of the filter, then is collected by the filtered region 2 into a water collecting tank 16 through the filtering action of a filter material layer 4 and the denitrification and denitrification action of a biological membrane attached to the surface of the filter material, and is discharged to a main water discharging tank, so that the whole filtering process is completed. The backwashing of the upward flow denitrification deep bed filter tank comprises the following steps: 1. and (5) air washing. Compressed air enters the area to be filtered 3 from the bottom air inlet pipe and then enters the filter material layer 4, so that the filter material layer 4 is slightly expanded, and simultaneously, the floating mud on the water surface can be smashed; 2. and (5) air-water combined washing. The first step of air washing is not changed, and simultaneously, backwashing clear water enters the filter material layer 4 from the to-be-filtered area 3 of the bottom backwashing water inlet pipe, and the filter material is further scrubbed through the air-water combined washing process, so that the backwashing water quantity is large. 3. And (5) washing with water. The air washing is closed, only single water washing is carried out, the washing water quantity is doubled, the expansion rate of the filter material layer 4 is obviously reduced due to the absence of the action of compressed air, the phenomenon of upward turning of the filter material does not exist, and the process mainly comprises the step of further washing impurities separated from the surface of the filter material.

As shown in fig. 1 to 10, the utility model discloses the structure of preventing filter material loss of preferred embodiment, prevent that the filter material from losing structure 1 and setting up in the filter tank, the filtering pond is separated by filtering material layer 4 and is formed filtering area 2 and treat filtering area 3, prevent that the filter material from losing structure 1 and set up at filtering area 2, including the bottom plate with link to each other and relative two first curb plates 11 that set up with the bottom plate, bottom plate and two first curb plates 11 enclose to close and form water catch bowl 16, water catch bowl 16 links to each other with the delivery port 5 in filtering pond, interval between two first curb plates 11 increases from water catch bowl 16's notch to the bottom plate direction gradually.

Based on above technical scheme, when filtering or backwash, the filter material of upper punch touches the bottom plate after, can be the pitch arc according to hydrodynamics principle filter material and sink, and other filter materials can receive the action of gravity to follow first curb plate 11 landing after touching first curb plate 11, can effectively prevent the loss of backwash in-process filter material, reinforcing backwash intensity and time improve the backwash effect, rinse filter material layer 4 more thoroughly, prevent that the filter material from hardening.

Preferably, the top of first curb plate 11 all is connected with second curb plate 12, and the water of being convenient for from this overflows through first curb plate 11, and is convenient for prevent that the filter material runs off the installation of structure 1. The second side plate 12 is perpendicular to the horizontal plane, and an included angle between the second side plate 12 and the first side plate 11 is an obtuse angle.

Further, the air deflector 17 is also included, and the air deflector 17 is fixedly connected to the outer side of the second side plate 12 through a fixing piece 15. The added guide plate 17 can enable the upward flow filter tank to underflow water, can effectively intercept floating sludge, prevents the sludge from flowing out along with water, and avoids the risk that the quality of the effluent water of the filter tank does not reach the standard due to the influence of floating sludge. Compare in traditional water catch bowl, the utility model discloses a 16 security of water catch bowl and reliability are higher, and filter material loss phenomenon obviously weakens, has reduced the working costs.

Preferably, the top of guide plate 17 flushes with the top of second curb plate 12, and guide plate 17 can effectively block rising float mud, and the backwash in-process is washed with float mud along with backwash waste water discharge box through air water antithetical couplet, and when too big because of the backwash water yield, backwash waste water overturns guide plate 17 and gets into water channel 6 and flow into water catch bowl 16 again, and the filter material that overturns guide plate 17 and flow into sinks by the action of gravity in water channel 6 to reduce the loss of filter material.

In this embodiment, the guide plate 17 is fixedly connected to the first side plate 11 through the rectifying plate 14, and the water outlet during backwashing is in a relatively severe state or a turbulent state, and the rectifying plate 14 can reduce the severe state to play a role in stabilizing the flow. In the embodiment, the bottom of the deflector 17 is welded with the first side plate 11 through the rectifying plate 14 to form a whole, so that the reliable connection of the deflector 17, the rectifying plate 14 and the first side plate 11 is ensured. Preferably, the rectifying plate 14 is provided with a plurality of water distribution ports, and the overflowing speed of the water distribution ports needs to be controlled within 0.1-1.0 m/s.

Further, the bottom plate comprises two third side plates 13 which are oppositely arranged, one ends of the two third side plates 13 are connected, the other ends of the third side plates 13 are connected with the first side plate 11, and an included angle is formed between the two third side plates 13. According to the fluid mechanics principle, the filter material sinks in an arc line when touching the third side plate 13, so that the filter material entering the water distribution port in the backwashing process can be effectively reduced.

In addition, the top of the second side plate 12 is provided with a plurality of weirs 121, and the weirs 121 can be in the shape of saw-tooth, hole or strip, so that the water outlet of the water collecting tank 16 is more uniform, and the uniformity of water distribution of the filter tank is further ensured.

When filtering, the relative second curb plate 12's of play water level top is low, floats mud and is kept off in the outside of guide plate 17, and is great because of backwash water yield during the backwash, and backwash waste water can be through guide plate overflow 17, and the mud that floats that is kept off can be followed water and washed into the water catch bowl, thoroughly will float mud and wash totally.

Specifically, in this embodiment, the weir 121 is zigzag, the height of the weir 121 ranges from 30 mm to 100mm, the ratio of the width to the height of the weir 121 is 2:1, and the distance between two adjacent weirs 121 is less than or equal to 50 mm. Reasonable value can be carried out to weir crest 121's size according to actual inflow and backwash water volume, and it is suitable to ensure the value, avoids appearing inhomogeneous water outlet phenomenon.

In the present embodiment, the included angle between the second side plate 12 and the first side plate 11 is 100-160 °, the included angle between the two third side plates 13 is 40-140 °, and the included angle between the second side plate 12 and the third side plates 13 is 30-140 °. This structure has ingeniously utilized first curb plate 11 to keep off the sand effect, and according to the hydrodynamics principle, the filter material can be the pitch arc and sink, can effectively reduce the back flush in-process and get into the filter material of water distribution mouth, because the water distribution mouth has certain angle, the filter material that deposits down falls back to filter material layer 4 along with second curb plate 12 again.

Preferably, the fixing member 15 may be a steel bar or a steel plate, and the rectifying plate 14 may be a steel plate. In this embodiment, the fixing member 15 and the rectifying plate 14 are made of steel plates, and the fixing member 15 and the rectifying plate 14 not only can play a role in fixing, but also can serve as the rectifying plate 14, so that the inflow water collecting tank through the water passage 6 is stable in water inflow, and the sinking of the filter material is facilitated.

Preferably, a water passing channel 6 is formed between the guide plate 17 and the second side plate 12, and the width of the water distribution port is larger than or equal to that of the water passing channel 6, so that water inlet and outlet are stable, and sedimentation of the filter material is prevented from being influenced.

In order to realize the same purpose, the utility model also provides an upward flow denitrification deep bed filtering pond, including the filtering pond, be equipped with foretell filter material loss prevention structure 1 in the filtering pond. Adopt the utility model discloses upward flow denitrification deep bed filtering pond, through setting up filter material loss prevention structure 1, make when the back flush, the filter material strikes the bottom plate of water catch bowl 16, can sink and return to filtering material layer 4, a small part of filter material can flow into water channel 6 through the water distribution mouth along with backwash waste water, because first curb plate 11 has certain gradient, the filter material strikes the swash plate and can sink in the region and return to filtering material layer 4, backwash waste water can cross guide plate 17 simultaneously, the not smashed mud float flows into water catch bowl 16 along with backwash waste water overflow to water channel 6 and obtains thorough cleaning. Adopt the utility model discloses an upward flow denitrification deep bed filtering pond simple structure can solve back flush in-process filter material and run off, has avoided appearing the phenomenon that come-up mud sediment influences water quality of water occasionally, can effectively improve back flush effect simultaneously, and reinforcing filter material throughput guarantees water quality of water.

The utility model discloses a working process does: the filtered water flows into the water collecting tank 16 through the rectifying plate 14, the water distribution port, the overflowing channel and the weir crest 121 of the filter material loss preventing device in sequence under the biochemical filtering action of the filter material layer 4. Along with the operation of the filter for a period of time, the biomembrane on the filter material layer 4 falls off and the anaerobic sludge at the bottom floats upwards, the agglomerated floating sludge is blocked by the guide plate 17, and the water discharged from the filter is still clear. When the filter tank is backwashed, the filter material rises along with the backwashing wastewater in the air-water combined washing process, the filter material is blocked by the third side plates 13 of the water collecting tank 16, because a certain angle is formed between the two connected third side plates 13, the filter material sinks in an arc line, most of the filter material falls back, and a small part of the filter material flows into the overflowing channel through the water distribution port, and because of the structural characteristics of the device, the rising flow rate of the filter material is greatly reduced and falls back along with the first side plate 11; in addition, the blocking sludge can be scattered and flows out of the filter tank along with backwashing wastewater in the gas washing and gas-water combined washing processes, and the purpose of thoroughly cleaning the filter material is achieved.

To sum up, the embodiment of the utility model provides an upward flow denitrification deep bed filtering pond and prevent that filter material runs off structure 1 thereof, it prevents that filter material runs off structure 1 when filtering or backwash, after the filter material touching bottom plate of upturn, the filter material can be the pitch arc according to hydrodynamics principle and sink, other filter materials can receive the action of gravity along first curb plate 11 landing after touching first curb plate 11, can effectively prevent the loss of backwash in-process filter material, reinforcing backwash intensity and time, improve the backwash effect, rinse the filter material layer 4 more thoroughly, prevent that the filter material from hardening. Upward flow denitrification deep bed filtering pond is through setting up filter material loss prevention structure 1 for when the back flush, the filter material strikes the bottom plate of water catch bowl 16, can sink and return to filter material layer 4, a small part of filter material can flow into water distribution mouth along with backwash waste water and cross water channel 6, because first curb plate 11 has certain gradient, the filter material strikes the swash plate and can sink in the region and return to filter material layer 4, backwash waste water can cross guide plate 17 simultaneously, the not smashed mud that floats flows into water catch bowl 16 along with backwash waste water overflow to water channel 6 and obtains thorough cleaning. Adopt the utility model discloses an upward flow denitrification deep bed filtering pond simple structure can solve back flush in-process filter material and run off, has avoided appearing the phenomenon that come-up mud sediment influences water quality of water occasionally, can effectively improve back flush effect simultaneously, and reinforcing filter material throughput guarantees water quality of water.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a prevent filter material loss structure, prevent that filter material loss structure sets up in the filtering pond, the filtering pond is separated by the filtering material layer and is formed the filtering district and treat the filtering district, prevent that filter material loss structure sets up the filtering district, its characterized in that, including the bottom plate and with two first curb plates that the bottom plate links to each other and set up relatively, the bottom plate with two first curb plates enclose to close and form the water catch bowl, the water catch bowl links to each other with the delivery port in filtering pond, interval between two first curb plates certainly the notch of water catch bowl increases gradually to the bottom plate direction.

2. The structure for preventing filter material loss according to claim 1, wherein the top of the first side plate is connected with a second side plate, the second side plate is perpendicular to the horizontal plane, and an included angle between the second side plate and the first side plate is an obtuse angle.

3. The filter material loss prevention structure of claim 2, further comprising a guide plate, wherein the guide plate is fixedly connected to the outer side of the second side plate through a fixing member.

4. The filter material loss prevention structure of claim 3, wherein the top of the deflector is flush with the top of the second side plate.

5. The structure of claim 3, wherein the guide plate is fixedly connected to the first side plate through a rectifying plate, and the rectifying plate is provided with a plurality of water distribution ports.

6. The structure for preventing filter material loss according to claim 1, wherein the bottom plate comprises two third side plates disposed oppositely, one end of each of the two third side plates is connected, the other end of each of the third side plates is connected to the first side plate, and an included angle is formed between the two third side plates.

7. The filter material loss prevention structure according to claim 2, wherein the top of the second side plate is provided with a plurality of weirs.

8. The filter material loss prevention structure of claim 7, wherein the weir is serrated in shape.

9. The filter material loss prevention structure of claim 8, wherein the height of the weir is 30-100mm, the ratio of the width to the height of the weir is 2:1, and the distance between two adjacent weirs is less than or equal to 50 mm.

10. An upward flow denitrification deep bed filter tank, which comprises a filter tank and is characterized in that a filter material loss prevention structure according to any one of claims 1 to 9 is arranged in the filter tank.

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